Improvement in sandpapering-machines



P, MCBRIDE 8|. W.JF. BRENIZER..

Sand-Papering Machines. 7 I "0.152 393. Patentedlune'23,1874.

772 5726 sex,- Q 57 UNITED STATES PATENT OFFICE.

PAUL MCBRIDE AND WARREN F. BRENIZER, OF \VILLIAMSPORT, PA.

IMPROVEMENT IN SANDPAPERING-MACHINES.

Specification forming part of Letters Patent No. 152,393, dated June 23,1874; application filed February 23, 1874.

To all whom it may concern:

Be it known that we, PAUL MCBRIDE and WVARREN F. BRENIZER, ofVilliamsport, in the county of Lyeomin g and State of Pennsylvania, haveinvented a new and useful Improvement in Sandpapering Machine forsmoothing moldings; and we do hereby declare that the following is afull and exact de scription of the same, reference being had to theaccompanying drawings and to the letters of reference marked thereon.

The object we have in view is the construction of a machine forsmoothing and polishing moldings of various styles and sizes, and eitherstraight or curved, in a more perfectmanner; and our invention thereinconsists,principally, in the means employed to give an elasticadjustable pressure upon the rubbers; in the means employed to adapt therubbers to either straight or curved moldings of various styles andsizes; in means employed for giving movement to the moldings, and at thesame to hold them upon the table by an elastic pressure; in pivoting therubbing-block frame; and in the combination of the various operativeparts, all as more particularly hereinafter set forth.

In order to enable those skilled in the art to make and use our machine,we proceed to de scribe the same in connection with the drawings, inwhich- Figure l is a front perspective elevation of our machine. Fig. 2is a vertical section of the same on the line 00 w of Fig. 1. Fig. 3 isa side view of the same.

Upon proper side frames A, connected by cross-ties a, and at the frontlower portion of the frames, is placed a shaft, B, journaled in theframes, and having outside of the frames a pulley, I). A driving-belt,O, communicates motion to the pulley b from a pulley, 0, upon a shaft,0, which is journaled in a forked arm, D, which is secured upon the topof one of the frames. A second pulley, d, is upon the same shaft, towhich power is applied in any convenient way todrive the machine. Uponthe inner end of the same shaft is placed a wheel, 6, with a wristpin,e, or a suitable crank, and upon the wrist-pin one end of a pitman, E,works, the other end of which is pivoted to a frame, F F, andreciprocates the same back and forth. This frame just mentioned consistsof an upper part, F, which reciprocates in ways Gr, pivoted at theirfront ends upon the inside of the upper portion of the side frames A,and a lower part, F, which also reciprocates in unison with the part F,and, in addition, has a vertical adj ustability. Upon the part F ismounted another frame, H, through the center of which a bolt passes downthrough both of the frames F and F, and is secured to the latter. Theupper part of this bolt is threaded to receive a thumb-nut,f, by meansof which the frame F may be raised or low ered. Through the projectingends of the frame H other bolts, f, pass down into leafsprings I, andare secured to said springs, and have their upper ends threaded andsupplied with suitable nuts 9, by means of which said springs may beraised or lowered as the frame F is raised or lowered. To the ends ofthe spring I are secured rods K, which pass down through the frame Finto the frame F, where their lower ends are secured. To the under sideof the frame F are secured three cross-pieces, L L, the outside oneshaving upon their inside tongues h, movable in suit able gains, h, andcapable of being adjusted in position in said gains by means of thescrews ]L2. The central cross-piece L has no tongue or gains, but may bearmed with holding-points. The object of the cross-pieces L and L is tohold two or more suitable rubbing-blocks, M M, placed between thecrosspieces named, and held in position by the screws k and theholding-points, if the latter are used, and having thus a lateraladjustability, limited by the length of such pieces. These blocks are ofvarious styles and sizes required for the various sorts of moldings, andare preferably arranged so that one block shall operate upon the innercurves of the moldings and the other upon the outer curves at the sametime. Upon the rear end of the machine another rubbing-block, M issecured to a slotted arm, i, which in turn is fastened to the machine insuch a way as to have a vertical adjustment, and at the same time (nablethe rubbing-block to be moved laterally, different angles of direction,and cause it to work into side recesses or curves in the moldings. Italso serves to hold down one end of so as to present its face in' a longmolding. All these rubbing-blocks are covered with sandpaper or otherwearin substances, secured to them in any convenient way. A bed, N, isarranged under the frame F, and has secured to its sides side pieces 0,the inner edges of which are adapted to slide up and down in ways Q,secured to one of the side frames A. Under the center of the bed is across-piece, It, one end of which protrudes through a slot, S, in theside frame A, and has 'a vertical movement therein regulated by ascrew-bolt, T, which passes down through suitable bearings 7; at the topof the side of the frame A, and through the protruding end of thecross-piece 1t, and by this means the bed is raised or lowered, asdesired. In the front end of this bed a feed-roll, U, is journaled, uponthe outer end of which is placed a pulley, I, which connects by a band,111, with the pulley b, and gives rotation to the feed-roll. A brace, V,holds the rear ends of the ways G in relative position, and enables theoperator conveniently to raise that end of the ways, and with them theframes F F, so as to give convenient access to the under part of theframe F for the removal or putting in position of the rubber blocks. Alatch, IV, is pivoted upon the outer part of the frame A, so as to turndown over and secure the the ways G in horizontal position. A holdingspring-rod, X, journaled in the side frames A, has a central portion, a,bent down toward the bed N, and its protruding upper end 0 is bent overand furnished with a sliding weight, 1), or, instead thereof, it mayhave a suitable spring, or both of them may be used together. The lowerpart a of this spring-rod X may conveniently fit into a score in asuitable block, 8, which fits into the principal recess in the molding,and holds down one end of the same.

In the use of our machine, the molding is introduced upon the bed andunder the rubbing-blocks, fastened down by the spring-rod, and motionmay be communicated to the maohine. The molding is then carried along bythe feed-roller, and the principal rubbingblocks reciprocated back andforth over the moldings with an elastic pressure, the rubbingblocksbeing adjusted. to fit the particular molding, whether straight orcurved.

The bed may be raised or lowered, as described, and also the lower frameF, so that moldings of any thickness may be smoothed. Whether the lowerframe F is raised or lowered makes no difference in the operation of theleaf springs, which are always kept up to their work by theiradjusting-screws.

The principal advantages of our machine consists in its greatconvenience in use, the excellent manner in which it performs its work,in that respect greatly surpassing handwork, and the rapidity andcheapness with which it performs its operations.

Having thus described our machine, and stated some of its advantages,what we claim as new therein, and our invention, is-

1. In combination with the frame F, having the cross-pieces L L and thetongues h, the rubbing-blocks M M, all constructed and ar rangedsubstantially as set forth.

2. In combination, the bed N having a feedroll, and the spring-rod'Xadapted to hold a molding upon said bed, all constructed and arrangedsubstantially as set forth.

3. In a machine for smoothing moldings, the pivoted frames F F,constructed and arranged substantially as set forth.

4. In combination, the vertically-adjustable pivoted frames F F and thebed N, constructed and arranged substantially as set forth.

5. In combination with the frames F F, the rubbing-blocks M M and therubbing-block M all constructed, arranged, and operating substantiallyas described and shown.

This specification signed and witnessed this 11th day of February, 1874.

PAUL MCBRIDE. WARREN F. BRENIZER.

\Vitnesses:

O. D. BREWER, J OIIN F. STEVENSON.

